https://resources.arcgis.com/en/help/arcobjects-net/componentHelp/0036/003600000172000000.htm
INAServerSolverResults.SolveMessages Property (ArcObjects .NET 10.1 SDK)
propertysdk
https://desktop.arcgis.com/en/arcobjects/latest/net/INAServerSolverResults.htm
INAServerSolverResults Interface (ArcObjects .NET 10.8 SDK)
ArcGIS Developer Help INAServerSolverResults Interface Deprecated as of 10.0. Provides access to properties that contain the results of performing network...
interfacesdk